'One-punch' advertisement by boxer Danny Green to air on TV networks in NSW

New South Wales Premier Barry O'Farrell says the major commercial television networks have agreed to show an advertisement by Australian boxer Danny Green about the dangers of single punch assaults.

The 15 second advertisement shows Green intervening in an argument by stopping someone about to throw a punch.

The Premier says the advertisement will air while the Government works on its own community awareness and media campaign to address the culture of binge-drinking and associated violence.

Danny Green says he hopes his campaign against the assaults will deter young men from starting fights and help to change people's attitudes.

"If you're going to conduct yourself in that way and go and crack someone for no reason at all, then it's a coward's thing to do," he said.

"We're all on the same page, we all just want to try and make a change.

"I guess the culture, [needs to] have a shift in the way we think. Especially young blokes who think it's acceptable or tough to go out and assault someone in a senseless and cowardly, unprovoked attack."

Mr O'Farrell says the advertisement will be shown on Seven, Nine, Ten, Prime, Win, Foxtel and SBS, in NSW and in some cases nationally.

"There could be no better person than a professional boxer in Danny Green to highlight the dangers of a one-punch and the dangers that violent assaults can cause," he said.

The NSW Government is hoping it will be able to pass proposed legislation, which aims to curb alcohol-related violence in Sydney, by this weekend.

It includes mandatory eight-year jail sentences for fatal one-punch attacks fuelled by alcohol or drugs, expanded Sydney CBD lockout zones, a freeze on new liquor licences, and the state-wide closure of bottle shops at 10:00pm.

The legislation comes in the wake of the death of 18-year-old Thomas Kelly, who died after being punched in Kings Cross in 2012, and more recently the death of 18-year-old Daniel Christie, who died in similar circumstances in early January after allegedly being punched in Kings Cross on New Year's Eve.

The Premier has urged the Legislative Council to support the legislation when it is put forward at a special session of Parliament tomorrow.